this is the man we talked so much about, dzhokhar tsarnaev. he is formerly -- formally charged with using a weapon of mass destruction. the 19-year-old could get the death penalty if he is convicted in this case. authorities say he has admitted to his role in the attack. bill: the details in the criminal complaint describe how calm the suspect appears after the explosions amid all the pandemonium and chaos. and how the death toll could have been much higher. molly line outside of the hospital. we're getting a timeline of the suspect's actions. what do we believe those actions were on monday afternoon? >> reporter: this information coming from an affidavit of a top fbi agent involved in the case the documents were released yesterday. how things played out the evidence they have. they have a lot of videotape evidence. according to the affidavit, suspect one and suspect two showed up in the area about 11 minutes before these bombs went off, both carrying large knapsacks. they detach from the crowd, reposition, then bomber two, dzhokhar tsarnaev w